Few important facts
- Double cross technique for hybrid seed production : DF Jones (1920).
- Jute (Conchorus spp) ; fibre is obtained from phloem.
- First commercial cotton of world is Hybrid-4.
- Highest area under wheat is Russia.
- Ist commercial hybrid cotton of world is hybrid-4.
- Cursec of water is equivalent to 1780 lpm.
- A neutral soil has pH between 6-8.
- Kalyan sona is the variety of paddy.
- Varuna is the variety of Indian Mustard.
- Salt resistant variety of Barley is Bilara-2.
- Low quality jute fibre is attributed to discoloration of fibre and very short fibre strands.
- Physiological stages of wheat is
a) CRI
b) Seedling stage
c) Tillering
d) ear emergence
- Optimum temperature for rice seed germination is 30-32 0
- Ist herbicide produced in world is 2,4-D.
- The ratio of cotton seed to lint is 2:1.
- Tensiometer is used at pressure of 0 to 0.8.
- Black cotton soil is deficient in Nitrogen.
- Jhuming means conventional method of cultivation in hilly areas.
- Hulling % of rice is 67%.
- Dapog method is concerned with nursery raising.
- Arkel is variety of Pea.
- 1 acre = 0.404 ha.
- SSP is a cheaper fertilizer.
- Short day plants require 8 hrs of light for good flowering.
- For setting of jute, best temperature is 34 0
- H-777 is a variety of cotton.
- Hazar dana : Phyllanthus nirusis
- Krishna nil : Anagallis arvensis